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Forum Index : Microcontroller and PC projects : A new display for the Pico with capacitive touch. BUT.......
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| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 9512 |
PicoMite V6.00.02b6 now supports capacitive touch using the FT6336 chip. In theory this chip supports touch reporting of up to 2 points at once AND simple gesture control. There are lots of boards with the chip available from the usual places I bought a couple as they look to have great potential with the PicoMite. The display itself is an IPS 320x240 controlled by the ILI9341 chip and this works nicely (It does need the INVERT option on the setup). In theory there is a SDcard socket but on my boards various of the required pins are not connected so that is useless. The FT6336 works and the firmware does support dual touch however touch seems very laggy. Gesture controls do not work and google reveals the manufacturer of the chip has produced versions both with and without this facility. Overall, the module is disappointing. I suspect the reason they are available cheap is that a large batch were produced with a wiring error on the PCB (no SDcard connections) and sub standard FT6336 chips. If you just need a bright display with touch they are OK but no real advantage over the standard ILI9341 with resistive touch.  |
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phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2281 |
Re the SD connections, looking at a magnified image of the back I think the 3 SD SPI pins may be paralleled with the LCD SPI pins. At the touch end of the connector there appears to be the SD_CS pin. Check continuity from SD socket to SPI and SD_CS pin to see if this is the case. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9512 |
Don't you think I did that? |
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| phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2281 |
The missing tracks could be replaced with wires from the SD socket running through a corner mounting hole to the top side and soldered to the relevant pins. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9512 |
Yes, of course but that defeats the object of buying a module SCK - not connected MOSI - not connected SD_CS - not connected Power, GND and MISO seem OK but as I said - probably duff board being sold off |
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Quazee137 Guru Joined: 07/08/2016 Location: United StatesPosts: 584 |
Check out the " version 3.8" version Quazee137 |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9512 |
Its going to be the same. On further inspection the issue is that they are designed for 5V and have a LCV245 buffer in the signals and, as been proved repeatedly, the SDcard won't work on a Pico through a level convertor. We need a straight connection. |
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stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2290 |
is 2350 pico 2 gpio 5V logic tolerable, inputs ? output will be 3.3V? |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9512 |
Tried - doesn't work. SDcard with buffers just never work with the Pico |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 1024 |
Not totally discouraged because I don't have a need for SDcard. But "laggy" when streaming or is there a perceptible lag when point touching? |
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